header {
  background-color: #f4483e;
}
main p {
  text-align: center;
  color: #999;
  font-size: 1.6rem;
  line-height: 3;
}
main ul li a img {
  width: 13rem;
  float: left;
  margin: 1rem;
}
main ul li a h1 {
  font-size: 2rem;
}
main ul li a h2 {
  font-size: 2.5rem;
  line-height: 2;
  color: #EE7700;
}
main ul li a h3 {
  color: yellowgreen;
  font-size: 1.5rem;
  margin: 0 0 1.5rem 16rem;
}
div.mask {
  height: 0;
  overflow: hidden;
  width: 100vw;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.4);
  position: fixed;
}
div.mask button {
  width: 9rem;
  height: 15rem;
  color: #fff;
  font-size: 5rem;
  line-height: 10rem;
  border: 0;
  background: rgba(0, 0, 0, 0.6);
  position: relative;
}
div.mask button:nth-of-type(1) {
  left: 1rem;
  top: 38rem;
}
div.mask button:nth-of-type(2) {
  left: 40rem;
  top: -2.7rem;
}
div.mask div.img img {
  position: relative;
  left: 0;
  top: 20rem;
  margin: auto;
}
div.mask div.img span {
  display: block;
  text-align: center;
  width: 6rem;
  font-size: 3rem;
  line-height: 4rem;
  color: #fff;
  background: rgba(0, 0, 0, 0.4);
  position: relative;
  left: 32.4rem;
  top: -1.3rem;
}
